Radon Mitigation Cost in Murfreesboro

Rutherford County is EPA Zone 1, and the Tennessee radon program reports that about one in four homes that request its free kit test above the action level. So plenty of Murfreesboro, Smyrna, and Rockvale homeowners end up asking the same thing: what will a radon system cost? We're a referral service, not an installer, and we don't set prices. What follows is published national data plus the local details that tend to move a quote, framed as typical ranges so you can make sense of the bids you get.

Typical national ranges

Angi's 2026 report, based on 1,184 verified projects, puts an active suction radon system, the standard fan-and-pipe design, at about $805 to $1,326, with an average around $1,043. The same report lists related costs worth budgeting for:

• Professional testing: about $150 to $700 (Tennessee residents can request a free state kit first)
• Permits, where required: about $25 to $150
• Electrician for a new circuit: about $50 to $100 an hour
• Larger homes: roughly $500 to $1,500 more
• Crawl space encapsulation, if you want it for moisture: about $1,500 to $15,000
• Energy: about $100 to $300 a year
• Extended warranties: about $200 to $500

Angi's city list doesn't include Nashville or Murfreesboro. Atlanta, the nearest city it lists, averages about $1,100. Treat that as a reference point, not a local price.

The crawl space factor

Crawl spaces are everywhere in Middle Tennessee, from older ranches near downtown Murfreesboro to plenty of newer subdivisions. A crawl space radon system, called sub-membrane depressurization, covers the soil with a heavy plastic membrane, seals it at seams, piers, and walls, and runs a suction pipe from underneath to a fan. Three things drive the price:

• Square footage. Membrane material and labor scale with the area of the crawl space.
• Clearance and obstacles. A low crawl space full of ductwork, plumbing, and piers is slow work.
• Condition. Standing water, debris, or an old torn vapor barrier may need attention before the new membrane goes down.

Our crawl space page covers how these systems work in more detail.

Slabs, basements, and combination homes

Slab homes are often simpler. A suction point is cored through the slab, frequently in the garage, and piped to the attic or up an outside wall. The catch in Middle Tennessee is the soil: dense clay and limestone rubble under a slab can limit how far suction spreads, so a second suction point or stronger fan may be needed.

Many homes in Rutherford County combine foundations, such as a crawl space under the main house and a slab under the garage or a bonus-room addition. One fan can often serve both areas, but each needs its own connection, which adds pipe and labor.

Other things that change a quote

• Pipe route. Through the garage and attic looks cleaner from the street; an exterior run is usually quicker.
• Fan power. Tighter soils need a higher-powered fan, which costs more and uses more electricity.
• Electrical access. An outlet near the fan location keeps costs down; a new circuit adds an electrician's time.
• Finished spaces. Finished basements and built-ins limit where suction points can go.

How to compare quotes side by side

1. Same design? Compare suction points, membrane coverage, fan model, and pipe route.
2. Is the membrane sealed at seams, piers, and walls, or just laid loose?
3. Who runs the post-mitigation test, and when? It should start at least 24 hours after start-up.
4. Is there a written guarantee, usually below 4 pCi/L?
5. What do the fan and labor warranties cover, and for how long?
6. Are permits and electrical work included?
7. Is the installer NRPP or NRSB certified? Tennessee doesn't license radon contractors, so certification is the main check.

Building new instead?

If you're building in Rutherford County, radon-resistant new construction puts most of the system in place before the slab is poured, usually for far less than a retrofit. And once a system is in, our maintenance and retesting guide explains how to keep it working.

Frequently asked questions

How much does radon mitigation cost in Murfreesboro?

Every house is quoted on its own. As a national reference, Angi's 2026 data puts a typical active radon system at about $805 to $1,326, averaging about $1,043. Large crawl spaces, multiple foundation types, and long interior pipe runs usually cost more.

Why do crawl space homes cost more to mitigate?

The system needs a sealed plastic membrane over the crawl space soil, priced largely by area, and the work is done in tight, low spaces. Big footprints and low clearance add labor.

Is crawl space encapsulation the same as radon mitigation?

No. Encapsulation is a moisture-control project and is usually much larger; Angi lists it at roughly $1,500 to $15,000 when it's needed. Radon mitigation adds suction under a sealed membrane. The two can be combined, but quotes should list them separately.

Can I test for free before paying for mitigation?

Tennessee's radon program offers free test kits to residents through TDEC. A professional test is worth considering for real estate deadlines or to confirm a high result.

What does a radon system cost to run?

Angi estimates about $100 to $300 a year in energy, which covers the fan's electricity and any conditioned air the system draws from the house.

Where this information comes from

• Angi: How Much Does a Radon Mitigation System Cost? (2026 national data)
• Tennessee Department of Environment and Conservation: Tennessee Radon Program
• EPA Map of Radon Zones, county data (Rutherford County, TN: Zone 1)
• EPA: Radon Frequently Asked Questions
• EPA: Find a Radon Test Kit or Measurement and Mitigation Professional